<template>
    <div class="photoinfo-container">

        <transition @before-enter="beforeEnter" @enter="enter" @after-enter="aferEnter">
            <div class="ball" v-show="ballFlag" ref="ball"></div>
        </transition>
        <!-- 商品轮播 -->
        <div class="mui-card">
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <swiper  :lunbotulist="lunbotu" :isfull="false"></swiper>
                </div>
            </div>
        </div>
        <!-- 商品购买 -->
        <div class="mui-card">
            <div class="mui-card-header">商品名称</div>
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <p class="old-price">市场价：<del>￥2045</del>  销售价：<span class="now-price">￥{{goodsinfo.sell_price}}</span></p>
                    <p>购买数量：<numbox @getcount="getSelectedCount" :max="goodsinfo.stock_quantity"></numbox></p>
                    <!-- 加入购物车时获取 goodsinfo 页面, numbox；子组件向父子间传值;父向子传值：直接绑定事件 -->
                    <mt-button type="primary" size="small">立即购买</mt-button>
                    <mt-button type="danger" size="small" @click="addToShopCar">加入购物车</mt-button>

                </div>
            </div>
        </div>
        <!-- 商品参数 -->
        <div class="mui-card">
            <div class="mui-card-header">{{ goodsinfo.tittle }}</div>
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <p>商品货号：{{ goodsinfo.goods_no }}</p>
                    <p>库存情况：{{goodsinfo.stock_quantity}}</p>
                    <p>上架时间：{{goodsinfo.add_time | dateFormat}}</p>
                </div>
            </div>
            <div class="mui-card-footer">
                <mt-button type="primary" size="large" plain @click="goDesc(id)">图文介绍</mt-button>
                <mt-button type="danger" size="large" plain @click="goComment(id)">商品评论</mt-button>
            </div>
        </div>

    </div>
</template>

<script>
    import swiper from '../subcomponents/swiper.vue';
    import numbox from '../subcomponents/goodsinfo_numberbox.vue'
    export default {
      data(){
          return {
              id:this.$route.params.id, //挂在路由参数对象传过来的id
              lunbotu:{ },
              goodsinfo:{ },
              ballFlag:false,
              selectedCount:1
          }
      },
        created(){
          this.getLunbotu();
              this.getGoodsInfo()
        },
        methods:{
          getLunbotu(){
              this.$http.get('Java/photoinfo' + this.id +'.json').then(result =>{
                  if(result.body.status === 0){
                      //循环轮播图数组的每一项，为item添加img属性
                      result.body.message.forEach(item =>{
                          item.img = item.src
                      })
                      this.lunbotu = result.body.message;
                  }
              })
          },
            getGoodsInfo(){
              this.$http.get('Java/getinfo' + this.id + '.json').then(result2 =>{
                  if(result2.body.status === 0){
                       this.goodsinfo = result2.body.message[0]
                  }
              })
            },
            goDesc(id){
              this.$router.push({name:"goodsdesc",params:{ id }});
            },
            goComment(id){
                this.$router.push({name:"goodscomment",params:{ id }});
            },
            addToShopCar(){
              this.ballFlag = !this.ballFlag;
              //拼接出一个，要保存到 store 中car数组里的 商品对象
                var goodsinfow = {
                    id:this.id,
                    count:this.selectedCount,
                    price:this.goodsinfo.sell_price,
                    selected:true
                };
                this.$store.commit("addToCar",goodsinfow)
            },
            beforeEnter(el){
                el.style.transform = "translate(0,0)";
            },
            enter(el,done){
              el.offsetWidth;
              //相对滚动位置
                const ballPosition = this.$refs.ball.getBoundingClientRect();
                const badgePosition = document.getElementById("badge").getBoundingClientRect();

                const xDist = badgePosition.left - ballPosition.left;
                const yDist = badgePosition.top - ballPosition.top;

                el.style.transform =`translate(${xDist}px,${yDist}px)`;
                el.style.transition = "all 1s cubic-bezier(.17,.67,.83,.67)";
                done()
            },
            aferEnter(el){
              this.ballFlag = !this.ballFlag
            },
            getSelectedCount(count){
              //子组件传过来的值保存到data
              this.selectedCount = count;
              console.log(",,," +this.selectedCount )
            }
        },
        components:{
          swiper,
            numbox
        }
    }
</script>

<style scoped lang="scss">
.photoinfo-container{
    background-color: #e8e8ee;
    overflow: hidden;
    margin-bottom: 100px;
    .now-price{
        color:red;
        font-size: 16px;
        font-weight: bold;
    }
    .mui-card-footer{
        display: block
    }
    .mui-card-footer button{
        margin: 10px 0;
    }
    .ball{
        width: 15px;
        height: 15px;
        border-radius: 50%;
        background-color: red;
        position: absolute;
        z-index: 99;
        top: 390px;
        left: 146px;

    }
}
</style>